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button.c

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/*************************************************************************
 *
 *  AUTHOR: Wilson T
 *
 *   TITLE: button.c
 *
 *  DATE: April 22, 1993
 *
 *  PURPOSE:  Query-type button definitions.
 *
 *************************************************************************/

#include <graphics.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>

#include"button.h"

void PushButton::set_constants(char *name, int color, int Id)
{
  Activated   = False;
  Color   = color;
  surface   = NULL;
  strcpy(string, name);
  IdNum = Id;
  Drawn = No;
  X=0; Y=0;

  Viewport surf;
  surf.SetTextStyle(FONT, HORIZ_DIR, FONT_SIZE);

  string_height = surf.TextHeight(string);
  // Adjust for differing fonts...
  string_height = (int)(string_height+(string_height*.33));
  string_width  = surf.TextWidth(string);
}

void PushButton::Init(Display *d, int x, int y)
{
  X = x; X2+=X;
  Y = y; Y2+=Y;

  Disp = d;
}

void PushButton::Draw()
{
  Activated = False;
  Drawn = Yes;

  Disp->FastDraw();
  Disp->SetFillStyle(SOLID_FILL, LIGHTGRAY);
  Disp->Bar(X+FRAME, Y+FRAME, X2-FRAME, Y2-FRAME);

  draw_shadows(BOTTOM_RIGHT, DARKGRAY);
  draw_shadows(TOP_LEFT, WHITE);
  draw_frame();
  name_button();
  Disp->Done();
}

void PushButton::Erase()
{
  if(Drawn == Yes) {
    Drawn = No;
    Disp->SetFillStyle(SOLID_FILL, Disp->GetBkColor());
    Disp->Bar(X, Y, X2, Y2);
  }
}

void PushButton::redraw()
{
  Disp->FastDraw();

  draw_shadows(BOTTOM_RIGHT, DARKGRAY);
  draw_shadows(TOP_LEFT, WHITE);
  name_button();
  Disp->Done();
}

void PushButton::depress_button()
{
  Disp->FastDraw();

  // Re-modified for test...
  draw_shadows(BOTTOM_RIGHT, LIGHTGRAY);
  draw_shadows(TOP_LEFT, LIGHTGRAY);
  Disp->SetColor(DARKGRAY);
  Disp->Line(X+FRAME, Y+FRAME, X2-FRAME, Y+FRAME);
  Disp->Line(X+FRAME, Y+FRAME, X+FRAME, Y2-FRAME);

  name_button();
  Disp->Done();
}

void PushButton::draw_shadows(SHADOW_STYLE style, int color)
{
  // Side shadows...
  int x = X+FRAME, y = Y+FRAME, x2 = X2-SHADOWS+FRAME, y2 = Y2-SHADOWS+FRAME;

  Disp->SetColor(color);
  for(int count=0; count<SHADOWS; count++)
  {
    switch(style) {
      case TOP_LEFT:
        Disp->Line(x+count, y+count, x2-count, y+count);
        Disp->Line(x+count, y+count, x+count, y2-count);
      break;
      case BOTTOM_RIGHT:
        Disp->Line(x+count, y2-count, x2-count, y2-count);
        Disp->Line(x2-count, y+count, x2-count, y2-count);
      break;
      case TOP_RIGHT:
        // Undefined for now...
      break;
      case BOTTOM_LEFT:
        // Undefined for now...
      break;
    }
  }
}

BOOLEAN PushButton::ButtonBounds(int Mx, int My)
{
  // Mouse will call and supply the coordinates of its position
  //  It's up to the button itself to determine it's bounds.

  BOOLEAN flag = False;

  if ((Mx<=X2-SHADOWS) && (Mx>=X) && (My<=Y2-SHADOWS) && (My>=Y))
    flag = True;
  else
    flag = False;

  return flag;
}

void PushButton::draw_frame()
{
  Disp->SetLineStyle(SOLID_LINE, 0, FRAME+1);
  Disp->SetColor(BLACK);
  Disp->Rectangle(X, Y, X2, Y2);
  Disp->SetLineStyle(SOLID_LINE, 0, 1);
}

void PushButton::name_button()
{
  int displacement, x, y, x2, y2;

  displacement = (Activated)? 1 : 0;

  x = X+BORDERX+SHADOWS+FRAME+displacement+1;
  y = Y+BORDERY+SHADOWS+FRAME+displacement-2;
  x2  = X2-BORDERX-SHADOWS-FRAME+displacement+1;
  y2  = Y2-BORDERY-SHADOWS-FRAME+displacement+1;

  Disp->SetColor(LIGHTGRAY);
  Disp->Rectangle(x-displacement, y-displacement, x2+1, y2+1);

  Viewport surf (Disp, x, y, x2, y2);

  if(surface==NULL) {
    int s = imagesize(x, y, x2, y2);
    surface = (void*) new byte [s];
    assert (surface != NULL);
    surf.SetColor(Color);
    surf.SetTextStyle (FONT, HORIZ_DIR, FONT_SIZE);
    surf.SetTextJustify(CENTER_TEXT, CENTER_TEXT);
    surf.OutTextXY(surf.GetMaxX()/2, surf.GetMaxY()/2, string);
    surf.GetImage(0, 0, surf.GetMaxX(), surf.GetMaxY(), surface);
  }
  else
    surf.PutImage(0, 0, surface, COPY_PUT);
}

Message PushButton::Dispatch(Message &msg)
{
  switch(msg.origin) {
    case MouseMsg:
      if (ButtonBounds(msg.d1, msg.d2)) {
        switch(msg.code) {
          case LMouseDown:
            Activated = True;
            animate_button();
            return Acknowledged;
          case MouseStillDown:
            if(!Activated) {
              Activated = True;
              animate_button();
            }
            return Acknowledged;
          case LMouseUp:
            Activated = False;
            animate_button();
            return Message (ButtonMsg, ButtonPress, IdNum);
          default:
            return NullMsg;
        }
      }
      if(msg.code==MouseStillDown && Activated) {
        Activated = False;
        animate_button();
      }
      return NullMsg;

/*    case KeyMsg:
      if (KeyBounds(msg.d1, msg.d2)
      return NullMsg;           */
  }

return NullMsg;
}

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